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Finding the Fourth Proportional to 762.99, 1,144.55 and 300.74

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Solution

The fourth proportional to 762.99, 1,144.55 and 300.74 is: 451.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.99 : 1,144.55 = 300.74 : x
  2. Step 2: Convert to fraction form
    762.99/1,144.55 = 300.74/x
  3. Step 3: Cross multiply
    762.99x = 1,144.55 × 300.74
  4. Step 4: Simplify right side
    762.99x = 344,211.97
  5. Step 5: Solve for x
    x = 344,211.97/762.99
  6. Step 6: Final answer
    x = 451.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.